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 A129364 a(n) = Product_{k = 1..n} A066841(k). 2
 1, 2, 6, 96, 480, 207360, 1451520, 2972712960, 722369249280, 5778953994240000, 63568493936640000, 9111096278347394580480000, 118444251618516129546240000, 10400352846118664303196241920000 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Conjecture: a(n) divides A092287(n) for all n - see comments in A129365. LINKS FORMULA a(n) = Product_{k = 1..n} Product_{d|k} d^(k/d). a(n) = Product_{k = 1..n} ((floor(n/k))!)^k. a(n) = exp(Sum_{k = 1..n} log(k)/2 * floor(n/k) * floor(1 + n/k)). - Daniel Suteu, Sep 12 2018 PROG (PARI) a(n) = prod(k=1, n, k^((n\k) * (1 + n\k) \ 2)); \\ Daniel Suteu, Sep 12 2018 CROSSREFS Cf. A007955, A066841, A092143, A092287, A129365. Sequence in context: A206156 A229052 A280117 * A092287 A035482 A322716 Adjacent sequences:  A129361 A129362 A129363 * A129365 A129366 A129367 KEYWORD nonn,easy AUTHOR Peter Bala, Apr 11 2007 STATUS approved

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Last modified October 15 10:46 EDT 2019. Contains 328026 sequences. (Running on oeis4.)